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Can someone help me with this Geometry question ASAP, thanks!

Can someone help me with this Geometry question ASAP, thanks!-example-1

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We are given an isosceles triangle.

An isosceles triangle has corresponding angles of corresponding sides same.

Therefore, other angle is also of (3x+7) degrees.

(5x+13) and (3x+7) makes a linear pair.

Therefore,

(5x+13) + (3x+7) = 180

5x +13 + 3x +7 = 180.

8x +20 = 180.

Subtracting 20 from both sides, we get

8x +20-20 = 180-20.

8x = 160

Dividing both sides by 8, we get

x = 20.

Therefore, correct option is 3rd option.

User CryptoJones
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